CompareOpen in Google PlayApp info
- Installs
- 1,000+
- Category
- Tools
- Content rating
- Everyone
- Version
- 1.4
- Released
- Apr 27, 2022
- Last updated
- 16 Oct 2026
- In-app purchases
- No
- Contains ads
- No
- Promo video
- No
- Requires Android
- 4.4
5.0185 ratings
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What's newin version 1.4
Implemented try/catch style error handling. RTNERR/RAISE support five additional error numbers. Keyboard mapping now uses a platform-independent syntax. Direct XEQ mapping. Implemented MENU1: Like MENU, but opens the Programmable Menu as an application menu, rather than as a function menu. Flag 33 is now automatically cleared whenever a non-programmable-menu key is pressed. Implemented IP→S: like AIP, but returns result to X instead of ALPHA. Fixed NORM/TRACE output for programmable menu.
About this app
HP-42S Compatible RPN Calculator with Large Display and Equations
Read full description
Plus42 is an advanced scientific programmable calculator, based on Free42. Free42, in turn, is a complete re-implementation of the HP-42S scientific programmable RPN calculator, which was made from 1988 until 1995 by Hewlett-Packard. Free42 is a complete rewrite and contains no HP code whatsoever. Plus42 builds on Free42 and adds: Algebraic expressions modeled after those used on the HP-27S and HP-17B/19B; attached units and unit conversions modeled after those used on the HP-48/49/50 series; directories for more organized storage of programs and variables; a larger display, with 8 rows and 22 columns (131x64 pixels) by default, which the user may resize at will; time value of money and amortization schedules; and two-dimensional plotting of functions, with ability to zoom and pan, and find integrals and roots from points in the plot.